Tractor seat stool



FIG. 1 is a perspective view of a tractor seat stool showing my new design;

FIG. 2 is front elevational view thereof;

FIG. 3 is a left side elevational view, with the opposite side being a mirror image thereof;

FIG. 4 is a back elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines shown in FIG. 6 depict environmental features that form no part of the claimed design. 

CLAIM The ornamental design for a tractor seat stool, as shown and described. 